<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=, initial-scale=1.0">
    <title>Document</title>
    <style>
        section{
            display: flex;
            flex-wrap: wrap;
        }
        div{
            margin: 10px 50px 10px 50px;
        }
    </style>
</head>
<body>
    <section>
        <div>aaaaaaaaaaaaa</div>
        <div>aaaaaaaaaaaaa</div>
        <div>aaaaaaaaaaaaa</div>
        <div>aaaaaaaaaaaaa</div>
        <div>aaaaaaaaaaaaa</div>
        <div>aaaaaaaaaaaaa</div>
        <div>aaaaaaaaaaaaa</div>
        <div>aaaaaaaaaaaaa</div>
        <div>aaaaaaaaaaaaa</div>
    </section>



</body>
</html>